@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "id", updatable = false, nullable = false)
private Long id; //作业列表ID
@Column(length = 200, name = "topic", nullable = false)
private String topic;//题目
@Column
private String description;//描述
@Column
private String answer;//参考答案
@ManyToOne(cascade=CascadeType.REFRESH,optional=true)
private List<Course> course; //课程和作业是一对多的关系
大神求解(类里面的信息是数据库里面的)